From some angles he does look fine....which is most. But especially with the suit...his head is proportionally on the large side, but not a deal-killer.

Dude, you have to remember that that is a Manip you posted in reference to the large head, the majority of the Pics of Cavill that are popping up are Manips, you can't base his head size (in costume) on these manips. All they are is the head being pasted on the costume, no one said they are true to proportion.